新城金矿主井附近工程爆破振动对其稳定性影响分析  

Influence of blasting vibration near main shaft on its stability in Xincheng Gold Mine

作　　者：罗文俊 关凯[1] 朱万成[1] 刘洪磊[1] 刘晓光 刘滨 LUO Wenjun;GUAN Kai;ZHU Wancheng;LIU Honglei;LIU Xiaoguang;LIU Bin(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;Xincheng Gold Mine,Shandong Gold Mining Co.,Ltd.,Yantai 261438,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]山东黄金矿业股份有限公司新城金矿,山东烟台261438

出　　处：《中国矿业》2022年第5期121-127,共7页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:52004053);中国博士后科学基金项目资助(编号:2020M670782);中央高校基本科研业务项目资助(编号:N2101028)。

摘　　要：金属矿山大多采用凿岩爆破法进行采准、切割和回采作业,评估爆破振动对附近既有工程(特别是主要开拓巷道)稳定性的影响,对于矿山生产建设的安全具有重要意义。新城金矿主竖井附近需要进行矿体回采和盲竖井断面刷大,为保证主竖井的稳定性,对矿体回采及盲竖井断面刷大的爆破相关参数进行了理论分析,并结合现场监测得到爆破振动衰减规律以及FLAC^(3D)数值模拟结果,评估了矿体回采和盲竖井断面刷大爆破振动对主竖井稳定性的影响。基于理论分析、现场监测及数值模拟研究结果发现,在新城金矿当前爆破参数条件下,若在距离主竖井50 m内进行矿体回采和盲竖井断面刷大作业,当允许同时爆破采场数目和最大炸药量分别不超过15个和1250 kg时,产生的爆破振动效应不会对主竖井稳定性产生影响。该方法为爆破振动影响的快速评价和爆破参数的初步设计提供了可行的手段。Rock drilling and blasting method is used for mining preparation,cutting and mining operations in most metal mines,and evaluates the impact of blasting vibration on the stability of nearby existing projects(especially the main development roadway)is of great significance for the safety of mine production and construction.Near the main shaft of Xincheng Gold Mine,the ore body needs to be mined and the section of blind shaft needs to be enlarged.In order to ensure the stability of the main shaft,the blasting related parameters for ore body mining and blind shaft section enlargement are theoretically analysed.Combined with the blasting vibration attenuation law obtained from field monitoring and numerical simulation based on FLAC^(3D),the influence of blasting vibration of ore body mining and blind shaft cross-section enlargement on the stability of the main shaft is evaluated.Based on the results of theoretical analysis,field monitoring and numerical simulation,it is found that under the current blasting parameters of Xincheng Gold Mine,if the ore body mining and blind shaft section enlargement are carried out within 50 m from the main shaft,the blasting vibration effect will not affect the stability of the main shaft when the number of allowed simultaneous blasting stopes and the maximum explosive amount are no more than 15 and 1250 kg respectively.This method provides a feasible means for rapid evaluation of blasting vibration and preliminary design of blasting parameters.

关 键 词：爆破振动 理论分析 竖井 断面刷大 

分 类 号：TD231.6[矿业工程—矿井建设]